Based on api-def (see [1]) and api-ref (see [2]) no PUT is not allowed on security-group rules
[1] https://opendev.org/openstack/neutron/src/branch/master/neutron/extensions/securitygroup.py#L239 [2] https://docs.openstack.org/api-ref/network/v2/index.html#security-group-rules-security-group-rules
Based on api-def (see [1]) and api-ref (see [2]) no PUT is not allowed on security-group rules
[1] https:/ /opendev. org/openstack/ neutron/ src/branch/ master/ neutron/ extensions/ securitygroup. py#L239 /docs.openstack .org/api- ref/network/ v2/index. html#security- group-rules- security- group-rules
[2] https:/